//**** RollOver

if (document.images) {

	var swp = new Array();
	for (i=0; i<11; i++) {
		swp[i] = new Image();
		swp[i].src = "images/button/btn" + (i + 1) + "a.gif";
	}
	for (i=11; i<22; i++) {
		swp[i] = new Image();
		swp[i].src = "images/button/btn" + (i - 10) + "b.gif";
	}

}

function swapImages(a, b) {
	if (document.images) {
		document.images[b].src = swp[a].src;
	}
}